READ ME NOW!!!
With reference to the label on the rear of the instrument and the required application
1. Check that power supply, probes and loads (compressor, heaters, etc.) are suitable for the
instrument.
2. Fasten the instrument to the panel as shown in the following fi gure.
3. Make all the required electrical connections.
4. Power up the unit.
5. After around 2 seconds, if the instrument displays the temperature read by the probes connected
to the device, go directly to point 7. If nothing is displayed or an alarm is signalled (alarm codes on
the display), power down, check the connections and the power supply and go to point 6.
6. Power the unit up again. If the instrument now correctly displays the temperature, go to point 7. If,
on the other hand, the problem described in point 5 is repeated, see the table “Alarms and signals:
display, buzzer and relay” to identify the cause of the problem.
7. ir33 smart is now ready to be confi gured. For correct confi guration based on the required
application, see the section “How to select and load a confi guration”.
+050001531 - rel. 1.1 del 09.03.2010
ir33 smart - IR33C7HB0E electronic controller for normal and low temperature ventilated refrigeration units
bn1: normal temperature (+2T10 °C) ventilated refrigeration units
with heater defrost (timed) - Temperature range: 2T10 °C
Temperature control Connection diagram
rd
Temp. °C
Set point
Compressor
DIRECT MODE
NTC/PTC 1
1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
L
N
L
L
N
N
R3
R1
R4
R2
115/230 V~
50mA~ max
PROBE
POWER
SUPPLY
Inputs Room probe NTC 1
Outputs
Compressor
R1: 16 A relay
Defrost heater
R3: 8 A relay
Evaporator fan
R2: 8 A relay
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
4 °C
rd Control differential (hysteresis)
2 °C
dl
dEF
Interval between defrosts
8 hours
dP1 Maximum evap. defrost duration
30 min
AL (*)
ALM
Minimum temperature alarm
-30 °C
AH (*) Maximum temperature alarm
30 °C
Ad
Temperature alarm delay
30 min
F0
FAn
Fan management
0
Fd Fans off after dripping
0 min
(*) alarm thresholds AL & AH absolute. Relay R4 is not used.
bn2: normal temperature (+2T10 °C) ventilated refrigeration units
with heater defrost (by temperature) and light control
Temperature range: 2T10 °C
Temperature control Connection diagram
rd
Temp. °C
Set point
Compressor
DIRECT MODE
NTC/PTC 1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
L
L
N
N
R1 R2
115/230 V~
50mA~ max
DI
12
R3 R4
POWER
SUPPLY
PROBES
DOOR
SWITCH
OLJKW
*: short-circuit terminals 10 and 11 if the door switch is
not used
Inputs
Room probe NTC 1
Defrost probe NTC 2
Door switch Digital input DI1
Outputs
Compressor R1: 16 A relay
Defrost heater R3: 8 A relay
Evaporator fan R2: 8 A relay
Light R4: 8 A relay
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
2 °C
rd Control differential (hysteresis)
2 °C
dl
dEF
Interval between defrosts
6 hours
dt1 Evaporator end defrost temperature
4 °C
dd Dripping time
2 min
d/1 Defrost probe 1 reading
-
AL (*)
ALM
Minimum temperature alarm
-30 °C
AH (*) Maximum temperature alarm
30 °C
Ad Temperature alarm delay
30 min
F0
FAn
Fan management
0
F1 Fan on temperature
5 °C
Fd Fans off after dripping
2 min
(*) absolute alarm thresholds
bn3: normal (+2T10 °C) or low temperature (-20T-14 °C) ventilated
refrigeration units with heater defrost (by temperature) and light control
Temperature range -20T-14 °C & +2T10 °C
Temperature control Connection diagram
rd
Temp. °C
Set point
Compressor
DIRECT MODE
NTC/PTC 1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
L
L
N
N
R1 R2
115/230 V~
50mA~ max
DI
12
R3 R4
POWER
SUPPLY
PROBES
DOOR
SWITCH
OLJKW
*: short-circuit terminals 10 and 11 if the door switch is not used
Inputs
Room probe NTC 1
Defrost probe NTC 2
Door switch Digital input DI1
Outputs
Compressor R1: 16 A relay
Defrost heater R3: 8 A relay
Evaporator fan R2: 8 A relay
Light R4: 8 A relay
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
-14 °C
rd Control differential (hysteresis)
2 °C
dl
dEF
Interval between defrosts
6 hours
dt1 Evaporator end defrost temperature
4 °C
dd Dripping time
2 min
d/1 Defrost probe 1 reading
-
AL (*)
ALM
Minimum temperature alarm
-50 °C
AH (*) Maximum temperature alarm
30 °C
Ad Temperature alarm delay
30 min
F0
FAn
Fan management
0
F1 Fan on temperature
5 °C
Fd Fans off after dripping
2 min
(*) absolute alarm thresholds
bn4: normal temperature ventilated refrigeration units (+2T10 °C)
with heater defrost (by temperature) and two evaporators
Temperature range +2T10 °C
Temperature control Connection diagram
rd
Temp. °C
Set point
Compressor
DIRECT MODE
NTC/PTC 1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
L
L
N
N
R1 R2
115/230 V~
50mA~ max
12a 2b
R3 R4
POWER
SUPPLY
PROBES
Inputs
Room probe NTC 1
Defrost probe 2a NTC 2
Defrost probe 2b NTC 3
Outputs
Compressor R1: 2 HP relay
Defrost heater 1 R3: 8 A relay
Defrost heater 2 R4: 8 A relay
Evaporator fan R2: 8 A relay
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
2 °C
rd Control delta
2 °C
dl
dEF
Interval between defrosts
6 hours
dt1 Evaporator end defrost temperature
4 °C
dt2 AUX evap. end defrost temperature
4 °C
dd Dripping time
2 min
d/1 Defrost probe 1 reading
-
d/2 Defrost probe 2 reading
-
AL (*)
ALM
Minimum temperature alarm
-30 °C
AH (*) Maximum temperature alarm
30 °C
Ad Temperature alarm delay
30 min
F0
FAn
Fan management
0
F1 Fan on temperature
5 °C
Fd Fans off after dripping
2 min
(*) absolute alarm thresholds
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
How to select and load a user confi guration
Step Action Effect Meaning
1
Switch the instrument on
while holding
After 2 seconds the
display shows the
message ‘bn0’
‘bn0’ is the current confi guration. (Standard CAREL
when fi rst switched on or other user confi guration,
if loaded)
2
Press
aux
or
def
The display shows the
messages ‘bn1’, ‘bn2’,
‘bn3’, ‘bn4’, ‘bn5’, ‘bn6’
Select the required confi guration
(refer to the following table)
3
Press
Set
The display shows “Std”
for 1 sec
The user confi guration selected in point 2 will be
loaded
This procedure can only be performed once: the most suitable confi guration for the application, once
loaded, will remain active the next time the instrument is started.
When switching on the fi rst time, bn0 corresponds to the Carel standard (default confi guration). The
procedure for loading one of the user confi gurations involves copying one of the sets of parameters
(bn1,...,bn6) to bn0. bn0 therefore always corresponds to the last confi guration loaded.
• Electronic controller for normal and low temperature ventilated refrigeration units
• 115/230 Vac switching power supply
• 16 A compressor relay
• Management of NTC (-50 to +90°C) and PTC (-50 to +150°C) sensors
• Simple and intuitive installation and confi guration
• 6 pre-loaded confi gurations for the most common refrigeration applications
• HACCP reports
• Real time clock
1
2
Wall mounting ir33
Wiring diagram
Wall mounting by two plastic brackets sliding in from side
1
2
IROPZDSP00
Display interface option
IROPZ48500
Serial board interface RS485
IROPZKEY**
Programming key
Optional connections
dima di foratura
drilling template
71x29 mm
34,4
70,5
79
76,2
80,6
38,6
56,5
65
Dimensions (mm)
Confi gurations
ir33 SMART is loaded with 6 default confi gurations (sets of parameters). Each confi guration identifi es
a specifi c refrigeration application, and can be identifi ed simply by the index (bn*) when switching the
instrument on.
Index Application Op. T. range Inputs Relay outputs
bn1
Normal temperature ventilated refrigeration
units with heater defrost (timed)
2T10°C NTC room
Compressor
Defrost
Fans
bn2
Normal temperature ventilated refrigeration
units with heater defrost (by temperature)
and light control
2T10°C
NTC room
NTC evaporator
DI door switch
Compressor
Defrost
Fans
Light
bn3
Normal or low temperature ventilated refrige-
ration units with heater defrost
(by temperature) and light control
-20T-14°C
2T10 °C
NTC room
NTC evaporator
DI door switch
Compressor
Defrost
Fans
Light
bn4
Normal temperature ventilated refrigeration
units with heater defrost (with two evapora-
tors, by temperature)
2T10°C
NTC room
NTC evaporator 1
NTC evaporator 2
Compressor
Defrost
Evap fans 1
Evap fans 2
bn5
Normal or low temperature ventilated
refrigeration units with heater defrost (with
two evaporators, by temperature)
-20T-14°C
2T10 °C
NTC room
NTC evaporator 1
NTC evaporator 2
Compressor
Defrost
Evap fans 1
Evap fans 2
bn6 Standard CAREL (default confi g.) -50T90 °C confi gurable confi gurable
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
IMPORTANT: separate the probe and digital input cables from the
cables to inductive loads and power cables to avoid electromagnetic
disturbance. Never run power cables (including electrical panel
cables) and signal cables in the same conduits.
bn5: normal (+2T10 °C) or low temp. (-20T-14 °C) ventilated refrigera-
tion units with heater defrost (by temperature) & two evaporators
Temperature range -20T-14 °C & +2T10 °C
Temperature control Connection diagram
rd
Temp. °C
Set point
Compressor
DIRECT MODE
NTC/PTC 1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
L
L
N
N
R1 R2
115/230 V~
50mA~ max
12a 2b
R3 R4
POWER
SUPPLY
PROBES
Inputs
Room probe NTC 1
Defrost probe 2a NTC 2
Defrost probe 2b NTC 3
Outputs
Compressor R1: 2 HP relay
Defrost heater 1 R3: 8 A relay
Defrost heater 2 R4: 8 A relay
Evaporator fan R2: 8 A relay
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
-14 °C
rd Control delta
2 °C
dl
dEF
Interval between defrosts
6 hours
dt1 Evaporator end defrost temperature
4 °C
dt2 AUX evaporator end defrost temp.
4 °C
dd Dripping time
2 min
d/1 Defrost probe 1 reading
-
d/2 Defrost probe 2 reading
-
AL (*)
ALM
Minimum temperature alarm
-50 °C
AH (*) Maximum temperature alarm
30 °C
Ad Temperature alarm delay
30 min
F0
FAn
Fan management
0
F1 Fan on temperature
5 °C
Fd Fans off after dripping
2 min
(*) absolute alarm thresholds
bn6: standard CAREL (default confi guration)
Connection diagram
DI DI
L
N
L
L
N
N
$8;
12 12
R3
R1
R4
R2
115/230 V~
50mA~ max
NTC/PTC 1
NTC/PTC 2
DI 1/NTC 3
DI 2/NTC 4
PROBES
POWER
SUPPLY
Main parameters
(type F)
Name Type Description Default value
St
CtL
Set point
-14 °C
rd Control delta
2 °C
rt Temperature monitoring interval
-
rH Maximum temperature read
-
rL Minimum temperature read
-
dl
dEF
Interval between defrosts
8 hours
dt1 Evaporator end defrost temperature
4 °C
dt2 AUX evaporator end defrost temp.
4 °C
dP1 Maximum evaporator defrost duration
30 min
dP2 Maximum evaporator defrost duration
30 min
dd Dripping time
2 min
d8
Alarm bypass time after defrost and/or door
open
1 hour
d/1 Defrost probe 1 reading
-
d/2 Defrost probe 2 reading
-
AL
ALM
Minimum temperature alarm
0 °C
AH Maximum temperature alarm
0 °C
Ad Temperature alarm delay
120 min
F1
FAn
Fan on temperature
5 °C
Fd Fans off after dripping
1 min
Indications on the display
When fl ashing, the signals on the display indicate a request that cannot be implemented until the delay
timers have expired.
Icon Function
Normal operation
Startup
ON OFF Flashing
COMPRESS. compressor on compress. off compress. call
FAN fan on fan off fan call
DEFROST defrost in progress no defrost call defrost call
AUX
AUX auxiliary output
active
AUX auxiliary output not
active
anti-sweat heater
function active
ALARM
delayed external alarm
(before the time “A7“has
elapsed)
no alarm present
alarms in norm.
operation (e.g. high/low
temp.) or immediate or
delayed ext. alarm from
digital input
CLOCK
if at least one timed
defrost has been set
no timed defrost has
been set
clock alarm
ON if Real-
Time Clock
present
LIGHT
light auxiliary output
active
light auxiliary output not
active
anti-sweat heater
function active
SERVICE no malfunction
malfunction (e.g.
EEPROM error or faulty
probes)
HACCP
function enabled (HA
and/or HF)
function not enabled HACCP alarm saved
CONT. CYCLE function activated function not activated function called
Buttons on the keypad
But. Pressing the button alone Pressing together with other buttons
• if pressed for more than
5 s, accesses the menu
for setting the type F
parameters (frequent)
• in the event of alarms:
mutes the audible alarm
(buzzer) and deactivates
the alarm relay
• if pressed with SET for more
than 5s, accesses the menu
for setting type C parameters
(confi guration) or downloa-
ding the parameters
• if pressed together with UP/
AUX for more than 5s resets
any alarms with manual reset
Start-up: if pressed
for more than 5 s at
start-up activates the
RESET procedure
Automatic address as-
signment: if pressed
for more than 1 s
enters the automatic
serial address assign-
ment procedure
aux
if pressed for more than 1
s, activates /deactivates the
auxiliary output
• if pressed together with DOWN/DEF for more than 5s, activates/deactiva-
tes the continuous cycle
• if pressed with SET for more than 5s starts the report printing procedure
(function available but to be implemented)
• if pressed with PRG/MUTE for more than 5s, resets any alarms with
manual reset
def
if pressed for more than 5
s, activates /deactivates a
manual defrost
• if pressed together with UP/AUX for more than 5s activates/deactivates
the continuous cycle
• if pressed for more than 1 s with SEL, displays a submenu with the
HACCP alarm parameters (HA, HAn, HF, HFn)
Set
if pressed for more than 1
s, displays and/or sets the
set point
• if pressed with PRG/MUTE for more than 5s, accesses the menu for setting
type C parameters (confi guration) or downloading the parameters
• if pressed for more than 1 s with DOWN/DEF, displays a submenu with the
HACCP alarm parameters (HA, HAn, HF, HFn)
• if pressed with UP/AUX for more than 5s starts the report printing procedu-
re (function available but to be implemented)
How to set the set point
Step Action Effect Meaning
1
Press
Set
for 2 seconds
After 2 seconds the display will show
the current set point
This the currently active control
set point
2
Press
aux
or
def
The value on the display will increase
or decrease
Set the desired value
3
Press
Set
The controller will show the temp.read by
the probes again
The set point is modifi ed and
saved
Another way of changing the set point is to set parameter “St” (see the tables below)
8 (4) A
8A 2FLA
12LRA
8 (4) A
8A 2FLA
12LRA
8 (4) A
8A 2FLA
12LRA
DI DI
L
N
L
L
N
N
$8;
12 12
R3
R1
R4
R2
R1 R2 R3 R4
12 (2) A
12A 5FLA
30LRA
EN60730-1
UL 873
-10T60
tLAN interface
SERIAL BOARD & KEY
PROBES
POWER
SUPPLY
CAREL INDUSTRIES HQs
Via dell’Industria, 11 - 35020 Brugine - Padova (Italy)
Tel. (+39) 0499716611 – Fax (+39) 0499716600
http://www.carel.com – e-mail: [email protected]
CmF
H0 Serial address 0 to 207 1 11111
H1 Function of AUX output
0 = Norm. energised alarm output; 1 = Norm. de-
energised alarm output; 2 = Auxiliary output. Activate/
deactivates output by AUX button on keypad; 3 = Light
output; 4 = Auxiliary evap. defrost output; 5 = Pump
down valve output; 6 = Condenser fan output; 7 =
Delayed compressor output; 8 = Auxiliary output with
deactivation in OFF; 9 = Light output with deactivation
in OFF;
10 = No function associated with the output;
11 = Reverse output in control with dead band;
12 = Second comp. step output;
13 = Second comp. step output with rotation
1 33441
H2
Lock keypad and/or remote
control
0 = Set type F par. and set point disabled;
2 = Set type F parameters, settings from remote and set point
disabled; 3 = Settings from remote disabled;
4 = Cont. cycle, defrost, set type F par. and ON/OFF
disabled; 5 = Continuous cycle, defrost, set type F para-
meters, set point and ON/OFF disabled; 6 = Continuous
cycle, defrost, set type F par. and set point disabled
111111
H3 Remote control enable code 0 to 255 0 00000
H4 Terminal buzzer 0: enabled; 1: disabled 0 00000
H6 Lock terminal keypad
1 (0) = enable/disable print report; 2 (1) = enable/
disable defrost; 4 (2) = enable/disable continuous cycle;
8 (3) = enable/disable mute; 16 (4) = enable/disable
HACCP access; 32 (5) = enable/disable AUX output; 64
(6) = enable/disable ON/OFF
000000
H8
Select output activated by
time band
0: time band linked to light output
1: time band linked to AUX (see ‘H1’ or ‘H5’)
000000
H9
Enable set point variation with
time bands
0: set point variation with time band disabled
1: set point variation with time band enabled
000000
Hdh Anti-sweat heater offset
AUX output confi gured as light or AUX (‘H1’= 2, 3, 8
or 9) remains off until the control temp. is less than
‘St’+’Hd’ when fi rst switching on or when resetting
alarms. (-0T200 °C)
000000
HcP
HAn Number of HA alarm events
High temperature alarm (HA). The maximum number of
events counted is 15 (0 to 15)
000000
HA Date/time of the last HA alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the last
alarm HA activated.
------
y_Year 0 to 99 000000
M_ Month 1 to 12 0 00000
d_Day 1 to 7 000000
h_ Hours 0 to 23 0 00000
m_ Minutes 0 to 59 0 00000
t_ Duration 0 to 99 hours 0 00000
HA1
Date/time of second-to-last
HA alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the second-to-
last HA alarm activated.
------
HA2
Date/time of third-to-last
HA alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the third-to-
last HA alarm activated.
------
HFn Number of HF alarm events
High temp. alarm for blackout (HF). The maximum
number of events counted is 15 (0 to 15)
000000
HF Date/time of the last HF alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the last HF
alarm activated.
------
y_Year 0 to 99 000000
M_ Month 1 to 12 0 00000
d_Day 1 to 7 000000
h_ Hours 0 to 23 0 00000
m_ Minutes 0 to 59 0 00000
t_ Duration 0 to 99 hours 0 00000
HF1
Date/time of the second-to-last
HA alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the second-to-
last HA alarm activated.
------
HF2
Date/time of the third-to-last
HA alarm
This parameter accesses the submenu to display the day,
month, year, hours, minutes and duration of the third-to-
last HA alarm activated.
------
Htd HACCP alarm delay Time delay for activation of HA and HF alarm 0 00000
rtc
td1 Defrost time band 1
Defrost setting with RTC for the fi rst time band.When
the display shows parameters td1 to td8, press SET to
set the day, hours and minutes of the defrost for the
selected time band
------
d_ Day
0 = Event disabled; 1,....7 = Monday,...,Sunday;
8 = Monday to Friday; 9 = Monday to Saturday;
10 = Saturday & Sunday; 11 = Every day
000000
h_ Hours 0 to 23
000000
m_ Minutes 0 to 59
000000
td2. ..
td8
Defrost time band 2 to 8
Defrost setting with RTC for the second to eighth time
bands
------
ton
Time band to switch light/
AUX on
Setting to switch light or AUX on with RTC (see par. H8)
When the display shows parameter ton, press SET to set
the ON day, hours and minutes
------
d_ Day
0 = Event disabled; 1,....7 = Monday,...,Sunday;
8 = Monday to Friday
000000
h_ Hours 0 to 23
000000
m_ Minutes 0 to 59 000000
toF
Time band to switch light/
AUX off
Setting to switch light or AUX off with RTC (see par. H8)
When the display shows parameter tof, press SET to set
the OFF day, hours and minutes
------
d_ Day
0 = Event disabled; 1,....7 = Monday,...,Sunday;
8 = Monday to Friday
000000
h_ Hours 0 to 23
000000
m_ Minutes 0 to 59 000000
tc RTC date/time setting
When the display shows parameter tc, press SET to set
the date and time of the RTC clock
------
y_ Year 0 to 99
000000
M_ Month 1 to 12 111111
d_ Day of the month 1 to 31 111111
u_ Day of the week 1 to 7 666666
h_ Hours 0 to 23
000000
m_ Minutes 0 to 59 000000
IMPORTANT WARNING: for the set times to become immediately operational, the instrument needs to be turned off and on
again. If this operation is not carried out, timing resumes operation the next time it is used, when the internal timers are reset.
Alarms and signals: display, buzzer and relay
Below is a table that describes the alarms and control signals, with the corresponding description, status
of the buzzer, alarm relay and type of reset.
Code Description Icon fl ashing
Alarm
relay
Buzzer Reset
rE Virtual control probe fault
ON ON AUTO
E0 Room probe S1 fault
OFF OFF AUTO
E1 Defrost probe S2 fault
OFF OFF AUTO
E2-3 Probe S3-4 fault
OFF OFF AUTO
“___” Probe not enabled - OFF OFF AUTO
LO low temperature alarm
ON ON AUTO
HI high temperature alarm
ON ON AUTO
AFr antifreeze alarm
ON ON MAN
IA immediate alarm from external contact
ON ON AUTO
dA delayed alarm from external contact
ON ON AUTO
dEF defrost running
always on
OFF OFF AUTO
Ed1 defrost on evaporator 1 ended by timeout - OFF OFF AUTO
Ed2 defrost on evaporator 2 ended by timeout - OFF OFF AUTO
Pd maximum pump down time alarm
O N O N AUTO/MAN
LP low pressure alarm
O N O N AUTO/MAN
AtS autostart in pump down
O N O N AUTO/MAN
cht high condenser temperature pre-alarm - OFF OFF AUTO/MAN
CHT high condenser temperature alarm
ON ON MAN
dor door open for too long alarm
ON ON AUTO
Etc real time clock fault
OFF OFF AUTO
EE Unit parameter EEPROM error
OFF OFF AUTO
EF Operating parameter EEPROM error
OFF OFF AUTO
HA HACCP alarm type HA
OFF OFF AUTO
HF HACCP alarm type HF
OFF OFF AUTO
rCt Connection with IR remote control active - - - -
Add Auto. address assignment procedure in progress - - - -
Prt Report printing in progress - - - -
LrH Low relative humidity procedure activation - - - -
HrH High relative humidity procedure activation - - - -
ccb Start continuous cycle call
ccE End continuous cycle call - - - -
dFb Start defrost call - - - -
dFE End defrost call - - - -
On Switched ON - - - -
OFF Switched OFF - - - -
rES Reset alarms with MAN reset, reset temp. monitor. - - - -
n1-n6 Alarm on unit 1-6 in the network
ON ON AUTO
dnL Download procedure in progress - -
d1-d6 Download procedure with errors on unit 1-6
OFF OFF -
Note: the buzzer is activated if enabled by parameter ‘H4’. The alarm relay is activated if auxiliary output 1 (H1) has been
assigned to the alarm relay function (normally closed or open). It can be disabled from the CAREL supervisory system.
Reset alarms with manual reset
All the alarms with man. reset can be reset by pressing “PRG/mute” and “UP/AUX” for more than 5 s.
Operating parameters
Complete list of parameters for each confi guration
frequent parameters ‘F’ psw protected parameters ‘P’ masked parameters (hidden)
Cd. Parameter Description
Confi guration
bn1 bn2 bn3 bn4 bn5 bn6
Pro
/2 Measurement stability 1 to 15 4 4 4 4 4 4
/3 Probe display response Temperature display refresh speed (0 to 15) 0 0 0 0 0 0
/4 Virtual probe Weight % of temp. control probe 2 (0 to 10%)
000000
/5 Select °C or °F 0: °C, 1: °F 0 0 0 0 0 0
/6 Decimal point 0: yes (-20 to 20 °C), 1: no 0 0 0 0 0 0
/tl Display on internal terminal
Probe reading displayed
1: virtual probe; 2: probe 1; 3: probe 2; 4: probe 3; 5:
probe 4; 6: probe 5; 7: set point
222221
/tE Display on external terminal
Probe displayed on remote term.
0: no remote term. ; 1: virtual probe; 2: probe 1; 3: probe 2;
4: probe 3; 5: probe 4; 6: probe 5
000000
/P Select type of probe 0: NTC –50T90 °C; 1: NTC –40T150 °C; 2: PTC –50T150 °C 0 0 0 0 0 0
/A2 Probe 2 confi guration
0: no probe; 1: product probe; 2: defrost probe; 3:
condenser probe; 4: antifreeze probe
022222
/A3 Probe 3 confi guration As for probe 2 (only if A4=0)
000220
/A4 Probe 4 confi guration As for probe 2 (only if A5=0)
000000
/c1 Probe 1 calibration or offset Corr. to probe 1 reading (-20T20 °C) 0 0 0 0 0 0
/c2 Probe 2 calibration or offset Corr. to probe 2 reading (-20T20 °C) 0 00000
/c3 Probe 3 calibration or offset Corr. to probe 3 reading (-20T20 °C)
000000
/c4 Probe 4 calibration or offset Corr. to probe 4 reading (-20T20 °C) 000000
ctl
St Set point r1Tr2 °C 4 2 -14 2 -14 0
rd Control delta Temp. control diff. or hysteresis (0.1T20 °C) 2 2 2 2 2 2
rn Dead zone 0.0T60 °C 444444
rr Reverse control differential +0.1T20 °C
2,0 2,0 2,0 2,0 2,0 2,0
r1 Minimum set point Min. value settable for the set point (-50Tr2 °C) -30 -30 -50 -30 -50 -50
r2 Maximum set point Max. value settable for the set point (r1T200 °C) 30 30 30 30 30 60
r3 Operating mode
0: direct thermostat with defrost control (cool)
1: direct therm. (cool); 2: reverse therm. (heat)
000000
r4
Automatic set point variation in
night-time
Value added to the set point in night-time operation (see
A4, A5 and A9) (-20T20 °C)
3,0 3,0 3,0 3,0 3,0 3,0
r5 Enable temp. monitoring 0: disabled; 1: enabled 0 0 0 0 0 0
rt Temp. monitoring interval temp. recording hours. (0 to 999) - -----
rH Maximum temperature read - -----
rL Minimum temperature read - -----
cmp
c0
Fan start delay (if relay fi tted)
on power-up
0 to 15 min 0 0 0 0 0 0
c1
Minimum time between consecutive
starts of compressor
0 to 15 min 0 0 0 0 0 0
c2 Min. compressor off time 0 to 15 min 0 0 0 0 0 0
c3 Min. compressor on time 0 to 15 min 0 0 0 0 0 0
c4 Duty setting or safety relay
Comp. operating time for control probe fault (Fixed off
time 15 min) (0 to 100 min)
15 15 15 15 15 0
cc Continuous cycle duration
Compressor operating time even when the temp. is
below the set point (0 to 15 hours)
000000
c6
Alarm bypass after continuous
cycle
0 to 250 hours 2 2 2 2 2 2
c7 Max pump down time 0 to 900 s
000000
c9
Enable autostart with pump
down operation
0 = Pump down cycle when closing the valve
1 = Pump down cycle whenever closing the valve and
on each following request from low pressure switch (no
cooling request)
000000
c10
Select pump down by time or
pressure
0 = End pump down by low press. switch activation; 1
= End when reaching low pressure or after maximum
time C7
000000
c11 Second compressor delay
Second compressor delay, after the fi rst, in start-up
(H1=7 or H5=7) (0 to 250 sec)
444444
dEF
d0 Type of defrost
0 = heater by temp. ; 1 = hot gas by temp.;
2 = heater by time; 3 = hot gas by time; 4 = heater by
time with temp. control
200000
dI Interval between defrosts 0 to 250 hours 8 6 6 6 6 8
dt1 Evaporator end defrost temp. -50T200 °C
4 44444
dt2 AUX evap. end defrost temp. -50T200 °C
444444
dP1
Maximum evaporator defrost
duration
1 to 250 min 30 30 30 30 30 30
dP2
Maximum AUX evaporator
defrost duration
1 to 250 min
30 30 30 30 30 30
d3 Defrost activation delay
Interval between defrost call and effective activation
of the relay
000000
d4 Defrost on start-up 0: disabled; 1: enabled 0 0 0 0 0 0
d5
Defrost delay on start-up or from
multifunction input
0 to 250 min 0 0 0 0 0 0
d6 Display during defrost
0 = During defrost the display shows “dEF” and the
actual temperature, alternating; 1 = During defrost the
display shows the last temperature displayed before
starting; 2 = During defrost the display shows “dEF”
on steady
111111
dd Dripping time after defrost
Waiting time before reactivating compressor and fans at
the end of a defrost (0 to 15 min)
022222
d8
Alarm bypass time after defrost
and/or door open
See a4, a5 and a9 (0 to 250 hours) 1 1 1 1 1 1
d8d Door open alarm delay See ‘a4’, ‘a5’ and ‘a9’ (0 to 250 hours)
000000
d9
Defrost priority over compressor
protectors
0 = protection times respected at start of defrost; 1 =
protection times not respected; the defrost has higher
priority
000000
d/1 Display defrost probe 1
- -----
d/2 Display defrost probe 2 °C/°F
------
dC Time base
0: ‘dI’ in hours, ‘dP1’ and ‘dP2’ in min.1: ‘dI’ in minutes
,‘dP1’and ‘dP2’ in seconds
000000
d10 Compressor running time
Compressor operating time with evaporator temp. less
than d11, after which a defrost is called (0 to 250 hours)
000000
d11 Temp. threshold in running time
Evaporation temp. below which the compressor must
continue operating for the time d10 to generate a defrost
call (-20 to 20 °C)
111111
d12 Advanced defrost
0 = Skip defrost and automatic variation in “dl” disabled;
1 = Skip defrost disabled, auto variation in “dl” enabled;
2 = Skip defrost enabled, auto variation in dl disabled; 3
= Skip defrost and automatic variation in “dl” enabled
000000
dn Nominal defrost duration 1 to 100%
65 65 65 65 65 65
dH Prop. factor for variation in “dl” 0 to 100% 50 50 50 50 50 50
ALM
A0 Alarm and fan differential 0.1T20 °C 2,0 2,0 2,0 2,0 2,0 2,0
A1 Type of threshold AL and AH 0: relative; 1: absolute 1 1 1 1 1 0
AL Min. temperature alarm -50T200 °C -30 -30 -50 -30 -50 0
AH Max. temperature alarm -50T200 °C +30 +30 +30 +30 +30 0
Ad Temperature alarm delay 0 to 250 min 30 30 30 30 30 120
ALM
A4 Digital 1 input confi guration
0 = input not active; 1 = Immediate ext. alarm;
2 = delayed external alarm (time A7); 3 = Enable defrost;
4 = Start defrost from ext. contact; 5 = Door switch with
comp. and fans OFF; 6 = remote ON/OFF; 7 = Curtain
switch; 8 = Low press. switch input for pump down; 9 =
Door switch with fans OFF; 10 = Direct / reverse opera-
tion; 11 = Light sensor; 12 = AUX output activation;
13 = Door switch with comp. and fans OFF (light not
managed); 14 = Door switch with fans OFF (light not
managed)
0 55000
A5 Digital 2 input confi guration as for A4
000000
A6
Stop compressor from external
alarm
Forced compressor operating time for external alarms
(0 to 100 min)
000000
A7 External alarm delay If A4= 2, A5= 2 or A9= 2 (0 to 250 min)
000000
A8 Enable alarms Ed1 and Ed2
0 = signal “Ed1” and “Ed2” on display (end defrost due
to maximum duration dP1/dP2) disabled1 = Sign. “Ed1”
and “Ed2” enabled
000000
Ac High condenser temp. alarm 0T200 °C
70 70 70 70 70 70
AE
High condenser temperature
alarm differential
Differential or hysteresis for activation/deactivation of
high cond. temp. pre-alarm (0.1T20 °C)
10 10 10 10 10 10
Acd
High condenser temp. alarm
delay.
0 to 250 min 000000
AF Off time with light sensor
Light sensor management
0 = sensor in the door jamb (the inside light is switched
on when the sensor detects light and off when it detects
darkness
> 0 = sensor inside cold room or cabinet; the inside light
is switched on when the sensor detects light. After the
time AF in seconds the light is switched off for 3 sec to
see if the door has been closed. In the event of darkness
the inside light remains off, the inside light it is switched
on again after a minimum time of 3 sec and the cycle
restarts (0 to 250)
000000
ALF Antifreeze alarm threshold Active if /A2, /A3, /A4 or /A5= 4 (-50T200 °C)
-5 -5 -5 -5 -5 -5
AdF Antifreeze alarm delay 0 to 15 min
111111
FAn
F0 Fan management
0 = Fans always on
1 = Fans on based on difference between control probe
and evaporator temp.
2 = Fans on based on evaporator temp.
000000
F1 Fan start temperature
F0 = 1 - F1 indicates the min. difference between room
and evap. temp. to activate the fans
F0 = 2 - F1 indicates the absolute fan activation temp.
-50T200 °C
5 55555
F2 Fan off with compressor off
0 = Fans always active (F0=0) or upon request (F0=1,2)
even when comp. off
1 = Fans off when compressor off
111111
F3 Fan in defrost
0 = Fans active during defrost
1 = Fans not active during defrost
001011
Fd Fans off after dripping Fan off time after defrost and after dd (0 to 15 min) 0 2 2 2 2 1
F4 Condenser fan stop temperature -50T200 °C
40 40 40 40 40 40
F5 Condenser fan start differential
Differential or hysteresis used for condenser fan control
(0.1T20 °C)
555555
+050001531 - rel. 1.1 del 09.03.2010
Technical specifi cations
Voltage Power
Power supply 115-230 V~, 50/60 Hz 6 VA, 50 mA ~ max.
Insulation guaranteed
by the power supply
insulation from very low
voltage parts
reinforced - 6 mm in air, 8 mm on surface, 3750 V insulation
insulation from relay outputs basic 3 - mm in air, 4 mm on surface, 1250 V insulation
Inputs S1 (probe 1) NTC & PTC
S2 (probe 2) NTC & PTC
DI1
S3 (probe 3)
voltage-free contact, contact resistance <10 , closing current 6 mA
NTC & PTC
DI1
S3 (probe 4)
voltage-free contact, contact resistance <10 , closing current 6 mA
NTC & PTC
Maximum distance of probes and digital inputs less than 10 m
Note: in the installation keep power supply and load connections separate from probe, digital input,
repeater display and supervisor cables.
Type of probe Std. CAREL NTC 10 k at 25 °C, range -50T90 °C
meas. error 1 °C in range -50T50 °C
3 °C in range 50T90 °C
High temperature NTC 50 k at 25 °C, range -40T150 °C
meas. error 1.5 °C in range -20T115 °C
4 °C in range outside of -20T115 °C
Std. CAREL PTC 985 at 25 °C, range -50T150 °C
meas. error 2 °C in range -50T50 °C
4 °C in range 50T150 °C
Relay outputs according to the model
EN60730-1 UL873
relay 250 V~ operating cycles 250 V~ operating cycles
R2, R3, R4 8 (4) A N.O. 100,000 8 A resistive 2 FLA
12 LRA C300
30,000
R1 12 (2) A
N.O./N.C.
100,000 12 A resistive 5 FLA
30 LRA C300
30,000
insulation from very low voltage parts reinforced: 6 mm in air, 8 mm on surface
3750 V insulation
insulation between independent relay outputs basic: 3 mm in air, 4 mm on surface
1250 V insulation
Connections screw terminals for cables from 0.5 to 2.5 mm
2
max current 12 A
The correct sizing of the power and connection cables between the instrument and the loads is the installer’s responsibility. In max.
load and max. operating temp. conditions, the cables used must be suitable for operation at least up to 105 °C.
Case plastic 34.4 x 76.2 x 79 mm (mounting depth 70,5 mm)
Assembly smooth, hard and indeformable panel using side fastening brackets to press in fully
drilling template 28.8 ±0.2 x 76.2 ±0.2 mm
Display digits 3 digit LED
display from -99 to 999
operating status indicated by graphic icons on the display
Keypad 4 silicone rubber buttons
Infrared receiver available
Clock with backup battery available
Auxiliary alarm relay available
Buzzer available
Clock error at 25°C ±10 ppm (±5.3 min/year)
error in the temperature range -50 ppm (-27 min/year)
ageing < ±5 ppm (±2.7 min/year)
discharge time typically 6 months (8 months max)
charge time typically 5 hours (<8 hours max)
Operating conditions -10T60 °C, <90% rH non-condensing
Storage conditions -20T70 °C, <90% rH non-condensing
Front panel index of protection assembly on smooth and indeformable panel with
IP65 gasket
Environmental pollution 2 (normal situation)
PTI of insulating materials printed circuits 250, plastic and insulating materials
17 5
Period of electrical stress across the insulating parts long
Category of resistance to heat and fi re category D and category B (UL 94-V0)
Class of protection against voltage surges category 1I
Type of action/disconnection 1B relay contacts (microswitching)
Construction of the control device built-in, electronic
Classifi cation according to protection against electric shock Class 2 when appropriately integrated
Device designed to he hand-held or integrated into equipment designed
to be hand-held
no
Software class and structure class A
Cleaning the front panel of the instrument only use neutral detergents and water
Serial interface for CAREL network external
Repeater display interface external
Maximum distance between interface and display 10 m
Programming key available
The IR33 range fi tted with the standard CAREL NTC sensor is compliant with standard EN 13485 on thermometers for
measuring the air and product temperature for the transport, storage and distribution of chilled, frozen, deep-frozen/
quick-frozen food and ice cream. Designation of the instrument: EN13485, air, S, A, 1, -50T90°C. The standard CAREL NTC
sensor is identifi able by the printed laser code on “WP” models, or the code “103AT-11” on “HP” models, both visible on
the sensor part.
Safety standards: compliant with the relevant European standards.
Installation warnings:
• the connection cables must guarantee insulation up to 90 °C; and, if necessary, up to 105 °C
• adequately secure the connection cables to the outputs so as to avoid contact with very low voltage components.
Manual defrost
As well as automatic defrost, a manual defrost can be activated, if the temperature conditions are right, by
pressing “DEF/DOWN” for 5 s.
HACCP functions
ir33 is compliant with the HACCP standards, as it monitors the temperature of the food stored. Alarm “HA”= max. th-
reshold exceeded: up to three HA events are saved (HA, HA1, HA2), from the most recent (HA) to the oldest (HA2),
with a signal HAn that displays the number of HA events saved. Alarm “HF”= power failure for more than 1 min.
and max. threshold AH exceeded: up to three HF events are saved (HF, HF1, HF2), from the most recent (HF) to the
oldest (HF2), with a signal HFn that displays the number of HF events saved. Setting the HA/HF alarm: parameter
AH (high temp. threshold); Ad and Htd (Ad + Htd = HACCP alarm delay). Displaying the details: press “SET” to
access parameters HA or HF and scroll using “UP/AUX“ or “DEF/DOWN“. Deleting the HACCP alarms: press “DEF/
DOWN” and “SET” for 5 sec. inside the menu, “res“ will be shown to indicate the alarm has been deleted. To
delete the saved alarms, press “DEF/DOWN“ + “SET” + “UP/AUX” together for 5 seconds.
Defrost event date and day (parameters td1 to td8)
0 = no event; 1 to 7 = Monday to Sunday; 8 = Monday to Friday; 9 = Monday to Saturday; 10 = Saturday
and Sunday; 11 = every day.
How to access and set type “F” parameters (FREQUENT, not protected by
password)
Step Action Effect Meaning
1
Press
for 5 seconds
After 5 seconds the display will show the 1st
parameter, “St” (set point)
Access to type “F” parameters is
direct
2
Press
aux
or
def
The display will scroll the list of type “F”
parameters (FREQUENT) (depends on the
confi guration loaded)
Select the desired parameter
3
Press
Set
The display will show the value of the
selected parameter
This is the current value of the
parameter
4
Press
aux
or
def
The value on the display will increase
or decrease
Set the desired value
5
Press
Set
The display will show the parameter
name again
IMPORTANT: parameters not yet
saved
6
Repeat steps 2, 3, 4 & 5 for all
parameters required
7
Press for 5 seconds
The controller will display the temperatu-
re read by the probes again
IMPORTANT: only now have all the
parameters been updated
How to access and set type “C” parameters (CONFIGURATION, password
protected)
Step Action Effect Meaning
1
Press &
Set
for 5 seconds
After 5 seconds the display shows “0”
Access to type “C” parameters
requires the password
2
Press
aux
or
def
The value on the display will increase
or decrease
Enter the password “22”
3
Press
Set
The display will show the fi rst
parameter in the list (depends on the
confi guration loaded)
The type “C” parameters also
include type “F”
4
Press
aux
or
def
The display will scroll the list of type
“C” parameters (CONFIGURATION)
Select the desired parameter
5
Press
Set
The display will show the value of the
selected parameter
This is the current value of the
parameter
6
Press
aux
or
def
The value on the display will increase
or decrease
Set the desired value
7
Press
Set
The display will show the parameter
name again
IMPORTANT: parameters not yet
saved
8
Repeat steps 4, 5, 6 & 7 for all
parameters required
9
Press
for 5 seconds
The controller will display the tempera-
ture read by the probes again
IMPORTANT: only now have all the
parameters been updated
For both types of access (type “F” and type “C”) there is a timeout (no button on the keypad pressed for
1 min), the procedure is ended without saving the parameter.
Accessing the parameters divided by functional blocks (allows the user
to scroll the list of parameters in blocks)
Once having accessed the type “F” or “C” parameters (see tables above)
Step Action Effect Meaning
1
Press
The display will show the name
of the functional block that the
parameter belongs to
Example ‘CMP’ for the compressor parame-
ters, ‘dEF’ for the defrost parameters
2
Press
aux
or
def
The display will show the name of the
other functional blocks
Example ‘Fan’ for the fan parameters
3
Press
The display will show the name of
the fi rst parameter in the functional
block selected
Example “F0” for ‘Fan’
Disposal of the product
The appliance (or the product) must be disposed of separately in compliance with the local standards in force on waste
disposal
IMPORTANT WARNINGS:The CAREL product is a state-of-the-art device, whose operation is specifi ed in the technical
documentation supplied with the product or can be downloaded, even prior to purchase, from the website www.carel.
com. The customer (manufacturer, developer or installer of the fi nal equipment) accepts all liability and risk relating to the
confi guration of the product in order to reach the expected results in relation to the specifi c fi nal installation and/or equip-
ment. The failure to complete such phase, which is required/indicated in the user manual, may cause the fi nal product to malfunction;
CAREL accepts no liability in such cases. The customer must use the product only in the manner described in the documentation
relating to the product.The liability of CAREL in relation to its products is specifi ed in the CAREL general contract conditions, available
on the website www.carel.com and/or by specifi c agreements with customers.
/
